They have no need of runway because they can lift off vertically
A helipad
They don't need an airstrip. They can take off and land anywhere (weather and ground fire permitting).
Vertical take off and set down for one Helicopters can hover.
heliport
Helicopters can take off from anywhere - runways, docks, building roofs, ship's decks. If it's a purpose-made spot it's usually called a helipad or a heliport.
They can land and take off almost anywhere.
Originally to take off and land where there were no runways.
Helicopters has a limited range compared to planes. Planes need a long pave to operate while helicopters can take off and land a lot more places. Also helicopters can "stand still" in the air while planes need to move all the time. So depending on what you want to do they have different (dis)advantages.
No, a helicopter cannot take off from the moon because there is no atmosphere to generate lift for the rotor blades to work. Helicopters rely on air density to generate lift, and the lack of atmosphere on the moon makes it impossible for a helicopter to fly.
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Helicopters are not like airplanes. They hover up and start to move forward.They do not take off like airplanes.So they do not move slowly before taking off.